Immersion Heater, 250 W Watts, Sheath Material Incoloy(R), Screw Plug Material Brass, Watt Density 39 sq in, Heater Voltage 120V AC, 1 Phase, Overall Length 4 3/8 in, Control Range 266 Degrees F, 1/2 in NPT, Min. Immersion Depth 3 1/2 in, Flange Material PTFE, Includes Brass Screw Plugs